The best-of-five semifinal likely will be decided in the final match Sunday. Top-ranked Novak Djokovic is expected to beat Canada's Milos Raonic, who took more than four hours to win his singles Friday. Then, Serbia's Janko Tipsarevic and Pospisil could meet in the decider.

The winner of the series will play for the title in November against the Czech Republic, which defeated Argentina in the other semifinal.